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The world’s forests will collapse if we don’t learn to say ‘no’

The world’s forests will collapse if we don’t learn to say ‘no’

An alarming new study has shown that the world’s forests are not only disappearing rapidly, but that areas of “core forest” — remote interior areas critical for disturbance-sensitive wildlife and ecological processes — are vanishing even faster.

Core forests are disappearing because a tsunami of new roads, dams, power lines, pipelines and other infrastructure is rapidly slicing into the world’s last wild places, opening them up like a flayed fish to deforestation, fragmentation, poaching and other destructive activities.

Most vulnerable of all are forests in the tropics. These forests sustain the planet’s most biologically rich and environmentally important habitats.

The collapse of the world’s forests isn’t going to stop until we start to say “no” to environmentally destructive projects.

Damn the dams

Those who criticise new infrastructure projects are often accused of opposing direly needed economic development, or — if they hail from industrial nations — of being hypocrites.

But when one begins to look in detail at the proposed projects, an intriguing pattern appears: Many are either poorly justified or will have far greater costs than benefits.

For example, in a recent essay in the journal Science, Amazon expert Philip Fearnside argues that many of the 330-odd hydroelectric dams planned or under construction in the Amazon will be more trouble than they’re worth.

Construction of the São Manoel Dam in the Brazilian Amazon. International Rivers/FlickrCC BY-NC-SA

Many of these dams will have huge environmental impacts, argues Fearnside, and will dramatically increase forest loss in remote regions.

This happens both because the Amazon is quite flat, requiring large areas of forest to be flooded, and because dams and their power lines require road networks that open up the forest to other human impacts. For instance, the 12 dams planned for Brazil’s Tapajós River are expected to increase Amazon deforestation by almost 1 million hectares.

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